This route is carried out in two steps; selective dimerization of isobutene (from C4 steams) to form di-isobutene, and hydrogenation to form saturated product isooctane.

• 异丁烯叠合-加氢可获得高辛烷值的异辛烷,是生产烷基化油的新途径,被称为间接烷基化技术。